Quote:
I believe they are saying that is the only safe load to use. It is the min and the max.
To reduced below that would cause a Kaboom and going over that load would also cause a kaboom.
If you use a charge that is to light it may cause an extreamly high pressure spike too soon and cause your gun to become a part of your face.
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While reduced charges in bottleneck rifle cases HAVE been documented to produce high pressure spikes, there's
no credible evidence that small charges in straight wall pistol cases (or even slightly tapered like 9mm P) will do so - there just isn't enough chemical energy present.
Most likely, going below the recommended minimum will cause erratic results and excessive extreme spread . . . in a worst-case scenario, it might even stick a bullet in the bore.
FWIW, Hodgdon shows the following data with a 147:
147 GR. HDY XTP
Hodgdon Titegroup .355" 1.100" OAL
Starting Load 3.2gr 855ft/sec 22,500 CUP
Maximum Load 3.6gr 929ft/sec 27,500 CUP